Official NHA Assessment

Race 6: CRS PREMIER YEARLING SALE 13 & 14 MARCH 2025 D STAKES (For All Horses with a nett rating of 69 & below)

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Line Horse
Gripen
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
3 / 8
Within 2 points
Significant Diffs
4 / 8
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Arbitration          2    63.0    1    0.00     0.0   74    68           68    -6
2    Gripen               4    59.0    2    0.50     2.0   61    61           61    +0
3    Ischyro              3    57.0    3    1.75     3.0   54    53           53    -1
4    Nile The Boss        4    56.0    4    1.95     2.0   58    53           53    -5
5    Dream Searcher       2    61.5    5    2.05     0.0   66    68           68    +2
6    Hay Fever            2    55.0    6    3.55     0.0   65    53           55    -10
7    District Master      3    57.5    7    3.85     3.0   63    52           53    -10
8    Petteia              2    57.0    8    7.10     0.0   55    56           56    +1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Arbitration 74 78 68 +10 0.0 -
2 Gripen Line 61 58 61 -3 2.0
3 Ischyro 54 54 53 +1 3.0 -
4 Nile The Boss 58 52 53 -1 2.0 -
5 Dream Searcher 66 87 68 +19 0.0 -
6 Hay Fever 65 54 55 -1 0.0 -
7 District Master 63 73 53 +20 3.0 -
8 Petteia 55 50 56 -6 0.0 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points